Capital gains distributions in activities and corporate actions

Broker API

Adds capital gains distribution coverage to account activities.

• New CGDActivityV2 schema, added to the activity event detail union returned by the activity event endpoints.
• The CGD activity type now documents the LTCG (Long-Term Capital Gain) and STCG (Short-Term Capital Gain) values on activity_sub_type.

Affected Endpoints

• GET /v1/accounts/activities
• GET /v1/accounts/activities/{activity_type}
• GET /v2beta1/accounts/{account_id}/events/activities/{event_id}
• GET /v2beta1/events/activities

Trading API

Adds capital gains distribution coverage to account activities.

• New CGDActivityV2 schema, added to the activity event detail union on the activity events stream.
• The CGD activity type now documents the LTCG (Long-Term Capital Gain) and STCG (Short-Term Capital Gain) values on activity_sub_type.

Affected Endpoints

• GET /v2/account/activities
• GET /v2/account/activities/{activity_type}
• GET /v2beta1/events/activities

Market Data API

Adds capital_gains_distribution as a supported corporate action type.

• GET /v1/corporate-actions accepts capital_gains_distribution in types and returns a capital_gains_distributions array described by the new capital_gains_distribution schema.
• The corporate actions SSE stream adds the capital_gains_distribution_corporateaction_event value on event_type, with the matching ca_event_capital_gains_distribution payload.

Affected Endpoints

• GET /v1/corporate-actions
• GET /v1beta1/events/corporate-actions